Portion of a crib



FIG. 1 is a front perspective view of a portion of a crib showing our new design;

FIG. 2 is an elevational view of a first side of the portion of a crib;

FIG. 3 is an elevational view of a second side of the portion of a crib opposite that shown in FIG. 2; and,

FIG. 4 is a bottom plan view of the portion of a crib.

The broken line showing of the remainder of the crib is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a portion of a crib, as shown and described. 